Apparatus for discharging refuse from ships.



G. G. RALSTON.

APPARATUS FOR DISGHARGING REFUSE FROM SHIPS.

APPLICATION FILED DEO.5,1QO8.

Patented Mar. 30, 1915.

8 SHEETSSHEET 1.

G. C. RALSTON.

APPARATUS FOR DISGHARGING REFUSE FROM SHIPS.

APPLICATION FILED DBO. 5, 1908.

Patented Mar. 30, 191.5.

8 SHEETS-SHEET 2.

fi w w W 2 W A M w a W fi :0 M W a 0/ Z Inventor.

Witnesses.

G. G. RALSTON.

APPARATUS FOR DISGHARGING REFUSE FROM SHIPS.

APPLICATION FILED DEC. 5,

Patented Mar. 30, 1915.

8 SHEETS-SHEET 3.

' Inventor.

w n1 2 H x Z W0 J 9 1 1 l-l-i i mm m WHH HMHHw Witnesses. W 7( m.

G. G. 'RALSTON.

APPARATUS FOR DISGHARGING REFUSE FROM SHIPS.

' APPLICATION FILED DEG.5, 1908.

Patented Mar. 30, 1915.

8 SHEETS-SHEET 4.

Fla/ 1 Inventor.

Witnesses. 22% KM G. G. RALSTON.

APPARATUS FOR DISGHARGING REFUSE PROM SHIPS.

APPLIOATIONIILED DEO.5, 1908.

1,1 33,503. Patented Mar. 30, 1915.

s SHEETSSHEET 5.

FIG/7. f/Q k5;

9 a y 7 6.6 Q, a 0% n "'Il' Wan/MW {7 G. 0. RALSTON. I APPARATUS FOR DISOHARGING REFUSE FROM. SHIPS.

APPLIUATION FILED DEC. 5; 1908.

Patented Mar. 30, 1915.

8 SHEETS-SHEET 6.

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mm fl/u m fi An w M y y EH5 W EHHHHHHHHHEHEE m Ex m 7/ I Witnesses W MW G. O. RALSTON.

APPARATUS FOR DISGHARGING REFUSE FROM SHIPS.

APPLICATION FILED DEC. 5, 1908 nay 5 www 9 EHWMHPHFHHFME UEQ 7 Inventor.

Witnesses.

G. c. RALSTON, I APPARATUS FOR DISCHARGING REFUSE PROM SHIPS.

APPLICATION FILED DBO. 5, 1908.

Patented Mar. 30, 1915 P O 8. m M e n V s n LN I T E n I00 m m fi 9 m u u" H 4 m H H E H7 1P 3 u 0 cm 3 S. 3 m 1 an L wfl 'tion on the'line IV'IV' UNITED STATES PATENT OFFICE.

GAVIN CARLYLE RALSTON, or LEE, ENGLAND, ASSIGNOR TO J. STONE & COMPANY,

LIMITED, 0F DEPTFORD, ENGLAND.

APPARATUS FOR DISCHARGING REFUSE FROM SHIPS.

Specification of Lctters latent.

.lPatented Mar. 30, 1915.

Applicationfiled-December 5, 1908. Serial m. 466,097.

To all whom it may concern:

Be it known that I, GAVIN CARLYLE RAL- sToN, a subject of theKing of Great Britain, residing at Cleveland, Leyland Road, Lee, in the county of Kent, England, have invented new and useful Improvements in Apparatus for Discharging Refuse from Ships, of which the following is a specificat1on.

This invention relates to improvements in apparatus for expelling or discharging ashes, ballast water, bilge water and other materials from ships and other places by means of compressed air or other fluid, of the type in which the ashes are crushed and then passed into a space such as the interior of a cook or valve or into a space or port in a piston reciprocating in a cylinder which space is also supplied by at set times or periodically with a charge of compressed air or other expelling. fluid so that the ashes or the like are discharged from such chambered plug or piston by the pressure fluid into the sea or other place, and the invention has for its object to simplify the construction, to improve or facilitate the working of such apparatus, to prevent leakage of compressed air. or other fluid, to lessen the wear on the working parts by preventing as far as possible ashes or other foreign matter from penetrating between working faces of the apparatus, to double the number of discharges for each revolution of the plug and to lubricate the latter.

Figure l of the accompanying drawings is a front elevation of an apparatus constructed accordingto'l'this invention. Fig. 2 is an end view thereof partlv in' elevation and partly in section. F 3 is a section on the-line 111 111 Fig. 1.' Fig. 4 is a sec is a section on the line "V V F ig. 4. Fig. 6 is a sectional elevation to an enlarged scale of a 'part of asimilar} apparatus intended to more particularly" illustrate the I elasticmeans for pressing the plughome in.

itscasing. Fig. 7 is, a similar detail-view of a modification. "8 is'a similar detail View showing the application'of a spring to the small end ofltheplug and Eigsu9'and'f 10 are similar detail views of modified constructions. Fig. 11 is a sectional elevation of a modified construction of ash expeller provided with a reciprocating piston in a cylinder or casing and adapted to permit of exhausting air from the discharge pipe and also from the space in the piston just before the latter is in position to receive a fresh chargeof ashes or the like. Fig. 12- is a transverse sectional elevation of the barrel or casing with a plug therein in position for the reception of a charge and Figs. 13 and 14 are similar views with the plug in such positions as to permit of the commencement of the discharge and to allow the exhaust port in the plug to register with the exhaust port in the casing respectively. Fig. 15 is a detail sectional View showing a piston valve adapted to open and close the supply of compressed fluid. .Fig. 16 is a more or'less diagrammatic end elevation of a modified form of apparatus. Fig. 17 is a transverse sectional elevation of a plug so divided as to permit of two dicharges for each revolution and in the position for taking in a charge in one compartment and for discharging from the other compartment. Fig. 18 is a similar view but showing the plug in position for exhausting. Fig. 19 is a detail end elevation showing means for permitting the apparatus to stop and to cut ofl the pressure fluid supplvby means of a special valve for that purpose in case the apparatus should become jammed, and Fig. 20 is .a rear elevation thereof while Fig. 21 is a detail end elevation of a modification in which the same valve casing for containing the valve to admit pressure fluid to expel the charge and operated by the cam or other moving part also contains the valve for cuttingfofl pressure fluid supply. in case ofia'jamming or breakage of a part' ofthe jof. Fig. 23 is 'a"se'ctionalj'elevationof a valve adapted'ito close automatically when the pressure falls at certain amount; Fig. 2% I is a sectional: side elevation of'a modification. "1

of th dev f' en" i li 9 h 22 but. showing how theshearing' ofa pin may bring about the "stoppageof the enginebr motor driving the pump which suppliesthe f expeller'." Fig325 isacrosssection of tliej cam 69"and of portion of the wheel 16, T

Fig. 26" is a plan of part of Fig.j2f4.'

Referring more particularly to Figs 1 to" 5'the plug a of the cock or valve which is of the taper type and which is as usual made hollow, is adapted to rotate freely in a correspondingly formed casing I) provided withcovers 0 and d, one at each end. The lower end of'the casing is flanged and may be bolted or fastened near-to the bottom of the ship, but in the case of vessels with double bottoms, or where it is inconvenient to mount the apparatus close to the bottom of the ship, a length of pipe (hereinafter called the discharge pipe and shown for in- "stance'marked 61 in Fig. 16) intervenes between the flanged base 6 of the casing and the bottom of the vessel. On top of the casing 6 is mounted a hopper f with a watertight cover g of well known construction and inside df this hopper there is a fixed serrated jaw h and a movable jaw z' mounted on a pin or pivots 7c and adapted to oscillate by means of a multiple cam Z mounted on a shaft m revolving in bearings n at each end of the hopper in such manner that the movable jaw oscillates three times (in this particular example) for every revolution of the shaft m and in order that the mov-.

able jaw shall closely follow the contour of the cam it is provided with a hinged rod 0 having a washer, a nut and a lock nut and a spring 31 working in an inclosed casing g the movable jaw being suitably provided with a. removable wearing piece or abutment 0* against which the camtakes. If desired crushing rollers may be used in addition to or in lieu of the crushing jaws or alternatively a grating to regulate the size of the material passing through, or both may be employed. In order to lubricate the cam the hopper is suitably provided with a lubricator s and there is an inspection door t. The camshaft 0% is suitably driven by a chain and a sprocket wheel a from the enine or otherwise in any convement manner and the other end of the said shaft has keyed thereto a sprocket wheel owhich by a chain w communicatesmotion to the stem or shaft m of the plug a by a sprocket wheel to cause the latter to revolve. .The'casing is provided with an inlet ort 9 for compressed air or other fluid, indicated in Figs. 1, 4 and 5 which port by a pipe 1 communicates with an additional valve 4 outside of the casing b, which valve has for its object'to entirely out off the compressed airor other is best seen in fluid supply to the plug valve 0,, thereby preventing leakage around the plug a except when thesupply of compressedjfluid is re quired toexpel the charge. The said valve Fig. 2 and it comprises a casing'2 connected to the air pipe 3 from the compressed air reservoir (not shown) and contains a mushroom valve 4] or equivalent valve having a spring'5 which always tends ts keep it on its seat or the top of the casing may have a ledge or abutment to limit the lift of the valve. The latter is provided with astem 6 guided in and passing out of the wheel revolves is adapted to come into contact with the roller at the end of the valve stem and so causes the valve to lift in the example shown against the action of the spring 5. The said spring is not actually necessary but it insuresthe definite closure of the valve when the cam in its revolution releases the valve stem, and renders the opening of the valve elastic or soft and presses the valve stem against the cam. The casing b may be made of cast iron or other suitable metal and may have an inner lining 8 of steel or other hardmetal and the plug a may be of such hard metal or of a metal diflerent from that'of the casing. Thecasing is provided with the port 9 for the admission of air when the valve 4 is opened and the plug is provided with a port 10 to correspond with the port 9 once during each revolution of the plug. The plug a also has an exhaust port 11 which registers with an exhaust port 12 in the casing once during fluid is allowed to escape after a discharge from the discharge pipe as well as fromthe 1nter1or ofthe plug thereby preventing the choking of the discharge pipe below the hollow plug owing to a cushion of compressed air having been left therein which also has the effect of preventing the free escape of the ashes or .at least of allowing the escape of such ashes at irregular intervals only, besides which if the air be relieved from the interior of theplug or piston as the plug again opens to admit a fresh charge, the air escapes and momementarily drives the charge of ashes or the like in an upward direction instead of allowing them to fall freely into the interior of the plug. It is evident that if desired the discharge pipe may have a separate exhaust which is opened or actuated by a valve or other wise, but having'regard to the fact that it is necessary to exhaust the interior ofthe plug, piston or the, like in order to prevent hopper or casing may be soprovided.-

WVater is supplied to spray and lubricate the plug by a pipe 16 to a grid 17 or casing provided with a single narrow opening or as shown with a number of downwardly projecting passages or jets 18 and mounted in the shell or casing Z). The taper plug a is elastically pressed home into the taper casing 6 by means of a helical spring 19 form-- ing an elastic packing and arranged concentric with the stuffing box 20.

In order to prevent the spring 19 from jamming the plug or at least from causing it to be too tight in the casing, the latter is provided with an adjustable screw bearing j fitted at the small end of the easing into which the gudgeon or short shaft on the end of the plug takes and this bearing is suitably provided with teeth on the periphery of its flange into which a worm or thelike -(not shown) gears, said worm being mounted in hearings, on the casing and suitably turned by a hand wheel so that the position of the plug can be regulated to a nicety. If desired and as shown the said screw bearing is provided with a liner.

At each end of the casing 25 there is a space between the ends of the plug a and the casing both of'which spaces are connected by pipes 120 and 121 or one space only may be connected to the oil supply while the other space is as to the oil is carried around with the plug as roeating piston of the kind [described may also be supplied with lubricant in a similar manner in whichcase the two 'ends would be connected by, a pipe of large diameter.

As shown in Fig. 6, the elastic 20 on. the casing .b

washer pressing against a packing ring 23 which again presses against a collar 24 on the shaft or, stem mof the plug a. Or as shownin Fig. .7 the spring 19 is .mounted so as to press at one end against the bearing 25 and at theother end against the sprocket wheel y/ the said springbeing if desired provided with a cylindrical case or covering 26.

Or the spring maybe mounted at the small end of the taper casing as shown in Fig. 8 in which the spring 19 presses against a screwed gland 27 which is provided with teeth 28 on its periphery, adapted to gear with a worm or a pinion turned by a hand wheel (not shown) to perconnected' to the first space, the ends of the plug are also, suitably so formed or shaped at 122 and 123 provide a greater space between its. ends and the ends of. the casing so that the circulation of the oil is promoted, that is,

' It is also evident,

packing .or spring 19 is, mounted in. the stuffing box the gland 21 pressingv against the spring, the. latter pressing against 1 a, metalwasher 22 and the said;

said teeth being mit of regulating the distance to which the plug a may move longitudinally by means of the spring in'the casing b. The small end of the plug is provided with a stem or extension 29 screwed at its end and provided with a nut 30 by which the amount of compression of the spring is adjusted and the ring 31 sliding on the stem 29, but being prevented from turning thereon by the feather 32, is interposed between the washer 33 and the nut 30 to prevent the nut from screwing or unscrewing during the revolution of the stem 29. The screwed gland 27 has a recess for packing 34 and a washer 35 is interposed between the packing and the spring 19. As in Fig. 7 the spring is shown provided with a cylindrical covering 26. Or according to another modification and as shown in Fig. 9, the plug a is drawn up against the interior of the plug casing?) by means of the spring 19 which is contained in a hollow gudgeon or stem 36 which spring is compressed between the head of a spindle 37 and the inside end of thesaid gudgeon by means of a nut 38 on the spindle and a ring 39 sliding on afeather 40 which is in contact with a screwed gland 41. The stem 36 revolves in a flanged bearing or sleeve 42 in the gland 41, the flange of which gland is provided with teeth 28 on its periphery or the like adapted to gear with a pinion or aworm (not shown) to permit of regulating the position of the taper plug in the casingagainstthe action ofthe spring, 01 as shown in. Fig. 10 the small end of the casing b is provided 'with a tension spring 43 for pulling the plug a up to its bearing in the casing, The spring is fixed or hooked to a disk 44 which rests in a recess at one end of the hollow stem of the plug a and the other end of the spring is also similarly connected to a lug on a disk 45. The latter is attached to the plug a. by means of a screwed bush 46 which can be adjusted to give the required tension on the spring 43 suitable provision being made to prevent the spring from being twisted by relative rotation between the parts 44 and 45. The bush .46 is provided with teeth 47 and it is adjusted by a worm or pinion as aforesaid, not shown. j I

Fig. 11 illustrates the application of the means to relieve the fluid pressure in the discharge pipe and. the space in the piston a simultaneously byproviding a port. 12

der at the top and the discharge opening 14..

9 representsthe port for the supply of presopening 13 at the top ready of air or other pressure flui end than that on the slower peripheral speed and-any fineports were in the sure fluid which is connected-to thevalve for the intermittent supply of said pressure fluid. A- spring 190 may also be employed to elastically compress the packing 48 for 5 the piston rod 49 when in apparatus of this kind a piston a reciprocating in a cylinder b is employed instead of a plug in a casing. Referring to Figs, 12, 13 and 14 the cock orvalve of this modified form of apparatus 10 is supplied periodically or at set times with compressed air or other fluid from an mtermittently operated valve such as is described with reference to Figs. 1 to5through a port 9 in the casing b and the latter 1s '15 also provided as before with an exhaust port 12, while the plug a is provided with 'a port 52 which registers alternately with the air inlet port 9 and exhaust port 12 in the casing b. Fig. 12 shows the plug with its to receive the charge of ashes or the like. Fig. 13 illustrates the position of the plug when beginning to discharge, 13 nearly registering-with the opening 14 25 and the port 52 beginning to register with the port 9 and Fig. 14 .shows the opening 13 in the plug only partly registering with. the discharge orifice 14 in the casing andthe port 52 establishing communication with 80 the exhaust port 12 sothat the pressure in thedischarge pipe and the interiorof the plug is simultaneously relieved before the plug reaches the position forthe next charge, thus preventing the retention of a cushion d in the discharge pipe and also obviating the pull of air, WlllCh would escape upward (carrying with it cinders or the like) when the opening 13 in the plug came opposite" to the in- 46 let for the-ashes Preferably thetwo ports 9 and 12 and the port 52 in the pIug are arranged near the smaller end of the casing and plug respectively as the wear on the surface of the plug and casing is less at that thelarger end owing to grit which falls through the opening 13 on to the liner while the plug is revolving will nottend to score the plug so much as if the large end.

Fig. 15 shows a tubular or hollow piston valve 53 adapted to be used instead'of the mushroom valve forithe intermittent supply of compressed fluid shown in Figs. 1,2 and 66 3. In this construction the hollow piston valve 53 is provided with admission ports 54, a stem with'a roller as before for the cam to operate, and the latter in its revolution lifts the hollow piston atthe appointed time against the action of the spring 5 until the admission ports 54 register with the annular chamber 55 in the valve casing56, which is connected to the pressure fluid supply pipe 3. The upper end of the hollow piston 53. is open and the upper end of the casing 56 shown) that is with the opening messes connects by a pipe Her-otherwise to the casing;of the plug'or its equivalent for reoeiving the charge'of ashes.

"Fig. '16 illustrates the construction in which theengine or other mechanism (not the casing -b j ust above the sluice or gate valve 63 and the waterpassing through this second delivery "pipe roduces a suction in the casing 12 andthen ves the charge ofashes into the sea through the valve 63' and dis charge pipe 64 after the water-under pressure through the delivery pipe 3 has emp tied or completed the emptying of thecon tents of the plug into the casing b. I is evident that if desired an ordinary reciproeating or other suitable pump maybe emdrives'a centrifugal pump for dis-- ployed, in lieu of a centrifugal pump, to

supply water at the necessary pressure to force :the ashes or the'like down the disdriven rom a suitable source of power and the plug and crusher are conveniently driven by chain and sprocket wheels from the same source. a

4 The valve indicated at 63 is used to close the pipe 64 when the apparatus is not in use or becomes accidentally disabled from any; cause, to prevent the sea-water from backing in, and the valve 103- in pipef3 is for controlling the water passing through pipe 3'. This last described apparatus forms charge ipe 64; The centrifugal pump is 1 the subject-matter of my-Patent N 0. 963,649, dated July 5, 19m, granted on an application which was a division ofthis application.

Figs. 17 and 18 illustrate a construction of expeller provided with a hollow plug a aving a diametrically arranged part1t1on 65- and with two oppositely arranged openings 13, made in the walls 66 of the'casing-each of "which openings is shown contiguous on one side to the partition. The ends of the plug or'the casing 01 both are so made, as described with reference to Fig. 4, as to form a space at each end between the plug and the casing and the said spaces are connected to a supply of oil, or one space may be so connected" while the other space 1s I connected to the first space. Asin the constructlons previously referred to and best se F s-1 itoxazt pr tam is p ov1dedw1th a hopper, for crushing the iso i of the crusher,

.into the hopper clinker, a valve operated by means of two cams or the like, an inlet port 9 for the pressure fluid and a port 12 for the exhaust while the plug itself is provided with air and exhaust ports to correspond, that is to say there is a port 67 for one compartment and a port 68 for the other. In Fig. 17, the port 67 is registering with the port 9 for the inlet of the pressure fluid to the lower compartment while the upper compartment is open to receive a fresh charge of ashes,

and Fig. 18 shows the wall 68 nearly closing the discharge opening 14 and the port 67 in the plug registering with the exhaust port 12 in the casing so that the pressure is relieved in the discharge pipe below the plug and in the interior of the plug itself, as two discharges are to take place during each revolution it follows that the airvalve for admitting air periodically must be operated twice during each revolution and for this purpose two cams such as marked 7 in Figs. 2 and 4 are mounted opposite to each other.

In order to prevent the hopper, the jaws the casing, the plug or other part of the apparatus from being broken in case a foreign body such as a piece of metal or other hard substance should be dropped and become caught or jammed in a part of the apparatus, the latter is suitably provided as shown as an example in Figs. 19 and 20 with a-breakable or shearing coupling part and means for entirely cutting off the supply of pressure fluid in the event of shearing taking place. The sprocket wheel u on the cam shaft m (which in this example is suitably mounted on the same end of the shaft as the sprocket.

wheel o) is provided with-a cam 69 pivoted at one end to a screw or pin 70 fixed to the said wheel u, while the other end of said cam is normally held fast by means of a stud 71 mounted in a recess in a boss at the end of the cam impelled by a spring 72 which causes the stud to take into a shallow recess 73 in the wheel so as to prevent the displacement of the cam under normal conditions. There is also a similar but deeper recess or hole 74 at a short distance from the recess 73 and further from the axis ofthe wheel. The shearing pin 75 is preferably made taper and driven into a hole on a crank 7 6 (forming the shearing arm and keyed to the shaft m) and into the sprocket wheel u, which is loose on the shaft. If the shearing pin should be sheared intermediate of the shearing arm 76 and wheel a the shaft m stops so that neither the crusher nor plug move while the wheel u continues to revolve and the pivoted cam 69 on the wheel immediately comes into contact with the shearing arm which is then stationary. The shearing arm then forces the cam to move outward so that its spring impelled stud 71 comes out of its normal resting place in the sprocket wheel u. If

recess 73 and as the said cam continues its movement, the stud rides over the surface of the disk of the wheel until it registers with the hole 74 when its spring forces it into the said hole thereby locking the cam 69 in such a position that instead of being clear of all obstructions as it was before, and normally is, it now comes into contact, on the continued revolution of the wheel, with the upper end orlaterally projecting arm of a hook-shaped tripping lever 77 (or other suitable device) fulcrumed at 78 to a bracket 79 fixed for example on the boss of the bearing n for the cam shaft m said bearing boss forming part of the hopper. If desired the said bracket 79 is provided with a guide for the hook-shaped tripping lever 77, formed by a downwardly projecting extension 80. The other or hooked end of this tripping lever 77 when struck by cam 69 comes out of engagement with a shackle or loop 81 pivoted or fixed to the end of the spindle 82 of a valve83 which normally tends to close by means of a spring 84 (the said spring and valve being indicated in dotted lines in Fig. 20). The valve is mounted in a valve casing 85 arranged between the receiver of the compressor and the air inlet valve 2 to supply the plug with a charge of pressure fluid for expelling the ashes or the like whenever the roller on the end of the valve stem (3 comes into contact with the cam 7 on the sprocket wheel y. When the pin 75 is sheared and the tripping lever 77 releases the valve spindle shackle 81, disappearing within its guide bracket 79, 80, the shackle is quite clear of the hook of the lever 77 and the valve spindle 82 drops owing to the action of the spring 84 on the valve, the result of the whole operation being that pressure is maintained in the re ceiver of the compressor, thereby preventing the engine from racing and no material damage is sustained by the expeller itself. To render the apparatus again ready for use it is only necessary to stop the engine, to knock out the parts of the sheared pin 75, to insert a fresh one and to return the cam 69 to its normal position with its s ring impelled stud in the shallow recess 3 in the desired the tripping lever 77 or other part (such as the cam 69) moved when a break-down or stoppage occurs is adapted to ring a hell or give any other mechanical or electrical aural or visual signal. I

The construction shown in Figs. 21 and 22 is very similarexcept that the valve casing 86 is adapted to contain both the valve 4 for cutting ofl, and opening the supply of air-or other pressure fluid periodically to the valve casing and the valve 83 for cutting off the supply of air entirely in case of the shearing pin 75 being sheared. The shape of the hook shaped tripping lever 77 1ts arrange'ment and its bracket are somewhat altered, that is to say the hook of the tripping lever is fixed on a long pin or pivot 87 mounted in bearings 88 on the bracket 79 fixedto hopper of the apparatus one of which bearings has formed in one therewith a bracket 89 with a hole therein through which the end of the hook normally protrudes, which bracket forms a stop to prevent the shackle 81 from following the hook when it is released. The other end of the pivot pin 87 is provided with an arm or lever 90, similar to the laterally projecting arm of the tripping lever shown in Fig. 19, and is adapted, as before, to be moved when the cam 69 is moved out of its path by the shearing arm 76 and is held in that position by the spring stud 71 taking into the,hole or deep recess 74. The valve casing 86 as aforesaid contains both valves 4 and 83; the valve 4 is provided with a short stem at the top which is guided in a cylin drical hole in the valve 83 and the latter also has an annular recess adapted to take the comparatively weak spring 5. The said valve 4 is also provided as before with a stem 6 suitably guided in a lower cylindrical extension of the casing provided with a stufiing box to prevent leakage and the stem has a roller at the extreme end adapted to ride over the cam 7 on the wheel y as it comes around. The valve 83 for entirely cutting off the supply of pressure fluid in case of accidents is provided with a strong spring 84 and its stem 82 is shown connected to the shackle 81 by a jointed rod 91, but a longer shackle would serve equally well. The upper end of the casing is also suitably provided with a stufling box to make a tight fit around the valve stem orrod 82. The valve casing is provided with an inlet '92 and an outlet 93 and one seating 94 serves for both valves.

Referring to Fig. 23 which illustrates a valve which is adapted to close or tend to close when the pressure falls below a certain point as would be the case if the plug of the expellenstopped in such a position as to allow a clear blow-through for the pressure fluid from the receiver or other source of supply, it will be seen that the valve proper marked 95 forms the lower end of a piston which is appropriately provided with piston rings 96, 97 and worksin the cylindrical part of the casing 98, there being a helical spring 99 which normally tends to close the valve on its seat 100, but when a certain predetermined pressure is exerted on the lower end of the piston, the valve is caused to rise into its casing against the action of the spring. In order to regulate thevalve so that it shall close? at the desired pressure,

the top of the casing 98 1s provided with a I screw hole through which passes a screw 101 having a perforated disk or washer 102 messes adapted to come'into contact with the top of the spring; There is a lock nut 103fto it from working freely. \l

, According to F igs. 24 to 26, the tripping lever 77 carried on the bracket 79 engages a catch 105 on a rod 106 pivotally connected with a lever 107 which in turn is pivotally connected with the stem 108 of a valve 109 in the duct 110 for the supply of pressure fluid to an engine or motor driving the pump which supplies the expeller. A spring 111 is always tending to close the valve 109 and therefore when the pin 75, connecting the crank 76 with the wheel u, is sheared, the

cam 69 in riding over the 'crank' 7 6 is moved the deep hole 74, and later on in the revolu-.

tion .knocks up the tail 90 of the tripping lever 77 so that the spring 111 is free to force up the stem 108 and valve 109, which latter thereupon stops the supply to the engine and the latter ceases to drive \the pump.

It will thus be seen'from the previous description that I provide a rotatable plug having a single receiving chamber for refuse, -Figs. 1 to 5 and 12 to 14, or a plug having a plurality of receiving chambersoperating to receive and to discharge alternately, Figs. 17 and 18, the circular walls of which chambers, or rather of the members in which they are located, operate as cut-off gates to prevent at all times the formation of a direct passage for sea water from the discharge or ejector pipe to the hopper 7. Each of the chambers alternately receives ashes &c. from the hopper and delivers them to the e ector pipe. The charge drops by gravity, assisted or forced by a fluid jet. This fluid may be compressed air that not only forces the charge out of the chambers but also prevents the seawater from entering the cham-J bersi' When the ashes.&c. are expelled by of the piston which would tend to prevent a liquid jet the sparging jet through the a e 3' 'is effective to dislodge any refuse 0 fallen by gravity from the that has not chamber or chambers and has been drawn to the jet" or stream through the pipe 64.

Thejjet'through the discharge pipe or tube 64 gathers velocity as it passes through the pipe, and consequently increases the velocity of the refuse carried thereby.

Whatl'I claim and desire tosecure by LettersPatent of the United States is lCAp'p'ar'atus for discharging ashes and other matter'from' ships comprising in combination a revolublehollow plug, a casing inclo'sing and. adapted to revolubly support said plug, a filling connection opening into said casing, a discharge connection opening into said casing, a supply port in said casing, a pressure fluid connection to said supply port, an exhaust port in said casing, an opening in said plug the path of travel of said opening intersecting said filling and discharge connections, and a second opening in said plug the path of travel of said second opening intersecting said supply and exhaust ports, said second open ing being so disposed with relation to the first named opening and said ports and connections being so disposed With relation to one another that said second opening is registered with said supply port When the first named opening is registered with said discharge connection and is registered With said exhaust port intermediate successive registrations of the first named opening With said discharge and filling connections substantially as set forth.

2. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble taper hollow plug, a casing inclosing and adapted to revolubly support said plug, elastic means operative to move said taper plug against its seat in said casing, a filling connection opening into said casing, a discharge connection opening into said casing, a supply port in said casing, a pressure fluid connection to said supply port, an exhaust port in said casing, an opening in said plug the path of travel of said opening intersecting said filling and discharge connections, and a second opening in said plug the path of travel. of said second opening intersecting said supplyand exhaust ports, said second opening being so disposed with relation to the first named opening and said ports and connections being so disposed With relation to one another that said second opening is registered with said supply port when the first named opening is registered with said discharge connection and is registered with said exhaust port intermediate successive registrations of the first named opening With said discharge and filling connections substantially as set forth.

3. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble taper hollow plug, a casing inclosing and adapted to revolubly support said plug, elastic means operative to move said taper plug against its seat in said casing, an adjustable stop operative at the small end of said taper plug to limit the seating movement of said plug, a filling connection opening into said casing, a discharge connection opening into said casing, a supply port in said casing, a pressure fluid :connection to said supply port, an exhaust port in said casing, an opening in said plug the path of travel of said opening intersecting said filling and discharge connections, and a second opening in said plug the path of travel of said second openmg intersecting said supply and exhaust ports said second opening being so disposed with relation to the first named opening and said ports and connections being so disposed with relation to one another that said second opening is registered With said supply port when the first named opening is registered with said discharge connection and is registered with said exhaust port intermediate successive registrations of the first named opening with said discharge and filling connections substantially as set forth.

4. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble taper hollow plug, a casing inclosing and adapted to revolubly support said plug, elastic means operative to move said taper plug against its seat in said casing, said elastic means to regulate the effort thereof on said plug, a filling connection opening into said casing, a discharge connection opening into said casing, a supply port in said casing, a pressure fluid connection to said supply port, an exhaust port in said casing, an opening in said plug the path of travel of said opening intersecting said filling and discharge connections, and a second opening in said plug the path of travel of said second opening intersecting said supply and exhaust ports said second opening being so disposed With relation to the first named opening and said ports and connections being so disposed with relation to one another that said second opening is registered with said supply port When the first named opening is registered With said discharge connection and is registered With said exhaust port intermediate successive registrations of the first named opening with said discharge and filling connections, substantially as set forth.

5. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble taper hollow plug, a casing inclosing and adapted to revolubly support said plug, elastic means operative to move said taper plug against its seat in said casing, a spray device directed on to the exterior surface of 'said plug, a pressure liquid supply connected to said spray device, a filling connection opening intosaid an adjustment operative upon 7 casing, a discharge connection opening into exhaust ports said second opening being-so disposed with relation to the first named opening and said ports and connections being so disposed with relation to one another that said second opening is registered with said supply port when the first named opening is registered with said discharge connection and is'registered with said exhaust port intermediate successive registrations of the first named opening with said discharge and filling connections substantially as set forth. 1

6. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble hollow plug, a plurality of isolated receptive cavities in said plug, a casing inclosing and adapted to revolubly support said plug, a filling connection opening into said casing, a discharge connection opening into said casing, a supply port in said casing, a pressure fluid connection to said supply port, an exhaust port in said casing, a plurality of openings in said plug each opening communicating with a separate cavity and the path of travel of said openings intersecting said filling and discharge connections, and a second plurality of openings in said plug each opening of said second plurality communicating with a separate cavity and the path of travel of these openings intersecting said supply and exhaust ports and each member of said sec-- ond plurality of openings being so disposed with relation to the corresponding member of the first named plurality and said ports and connections being so disposed with relation to one another that members of said second plurality are registered with said supply port when corresponding members of the first plurality are registered with said discharge connection and are registered with said exhaust port intermediate the registrations of the corresponding members "of the first plurality intermediate successive registrations of the first named opening with said discharge and filling connections, substantially as set forth.

7. Apparatus for discharging ashes and other matter from ships comprising in combination a revoluble taper hollow plug, a casing inclosing and adapted to revolubly support said plug, elastic means operative to move said .taper plug against its seat in said casing, a pipe connection with each end of said casing, means for supplying lubricant to said pipe connections, means revoluble with said plug for distributing said lubricant, a filling connection opening into said casing, a discharge connection opening into said casin a supply port in said casing, a pressure fiuid connection to said supply port, an exhaust port in said casing, an opening in said plug the path of travel of said opening intersecting said filling and discharge connections, and a second opening in said plug the path of travel of said second opening intersecting said supply and exhaust ports, said second opening being so disposed with relation to the first named opening and said ports and connections being so disposed with relation to one another that said second opening is registered with said supply port When the first named opening is registered with said discharge connection and is registered with said exhaust fport intermediate successive registrations of the first named opening with said discharge and filling connections, substantially as set forth.

8. Apparatus for discharging ashes and other matter from ships and other places comprising in combination a receptacle movable to alternately present its open mouth to filling and discharge connections, said filling connection, said discharge connection, a compressed fluid supply, an exhaust connection, means adapted to connect the interior of said receptacle with said supply during the period of presentation of its opening to said discharge connection, driving means for said receptacle, a limited power transmission coupling operatively connecting said driving means and said receptacle, said coupling being inoperative when its transmitting ca pacity-is exceeded, means normally inoperative but adaptedt'o stop said supply of compressed fiuid, means in connection with said coupling adapted to render the last named means operative consequent upon the coupling becoming inoperative, and means adapted to connect the interior of said receptacle with said exhaust connection while said opening is passing from said discharge connection to said filling connection.

9. Apparatus for discharging ashes and other matter from ships and other places, comprising in combination a receptacle movable to alternately present its open mouth to filling and discharge connections, said filling connection, said discharge connection, acompressed fiuid supply, an exhaust connection, means adapted to connect the interior of said receptacle with said supply during the period of presentation of its opening to said discharge connection, means operative upon reduction of pressure in said fluid supply to shut off said supply and means adapted to connect the interior of said receptacle with said exhaust connection while said opening is passing from said discharge connection to said filling connection.

10. Apparatus for discharging ashe and other matter from ships and other p aces, comprising in combination a receptacle moirable to alternatelypresent its open mouth to filling and discharge connections, said filling connection, said discharge connection, a compressed fiuid supply, an exhaust connection, means adapted to connect the interior of said receptacle with said supply during the period of presentation of its opening to said discharge connection, a normally open valve in said compressed fluid supply, means operatiie to close said valve, a catch operative to hold said valve in the open position against the action of said closing means, driving means for said receptacle, a limited power transmission coupling operatively connecting said driving means and said receptacle said coupling being inoperative when its transmitting capacity is exceeded, a trip gear rendered operative consequent upon the failing of said coupling and operative to release said catch from said valve permitting thcclosing means to operate, and means adapted to connect the interior of said receptacle with said exhaust connection while said opening is passing from said discharge connection to said filling connection.

11. Apparatus for discharging ashes and other matter from ships and other places comprising in combination, a receptacle, a discharge duct, a hollow movable body intermediate said receptacle and said duct and operative to alternately receive matter from said receptacle and transfer it to said discharge duct, a compressed fluid supply, valves operated in consonance with said body to admit compressive fluid to said body at the time of said discharge, and means automatically operative upon the occurrence of danger conditions to stop said fluid supply.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

GAVIN CARLYLE RALSTON.

\Vitnesses I ALFRED NUTTING, PERCY PHILLIPPS. 

